Prediction and enhancement of the acoustic performance of a spark ignition engine intake air filter box

Siano, Daniela; Costa, Michela; Bozza, Fabio

doi:10.1177/0954407012461746

Cited by 5 publications

(2 citation statements)

References 15 publications

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“…However, the air filter elements exhibit good noise attenuation characteristics at higher frequencies. This approach is similar to the procedure described by Siano et al 17 There is a need for a simple method to incorporate the effect of the air filter in the analysis. Kang and Ih 6 modeled the filter paper as a rigid micro-perforated panel.…”

Section: Introductionmentioning

confidence: 99%

Acoustic Modeling and Analysis of Automotive Air-Filters

Veerababu,

Sachin,

Subhashini

et al. 2023

The International Journal of Acoustics and Vibration

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Air filters are placed upstream of internal combustion engines to remove dust particles in the suction air. In this article, we examine the acoustic characterization of an air-filtering unit in the absence of mean flow. For this purpose, a circular air-filtering unit with an axial inlet and side outlet widely used in the automobile industry is considered. The air-filter element is modeled as an equivalent acoustic fluid with finite flow resistivity. The flow resistivity of the region is estimated from the permeability of the filter paper and the geometrical arrangement of the paper folds (pleats) inside the air-filter element using an electrical analogy. A numerical model based on the finite element method (FEM) and an analytical model using classical one-dimensional plane wave analysis (1-D PWA) was developed. Experiments were carried out using an impedance tube to estimate transmission loss. A good correlation is observed between the FEM model and the experiments. The results obtained from the 1-D PWA are in reasonable agreement with those obtained from the other two methods.

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Section: Introductionmentioning

confidence: 99%

Acoustic Modeling and Analysis of Automotive Air-Filters

Veerababu,

Sachin,

Subhashini

et al. 2023

The International Journal of Acoustics and Vibration

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“…The reduction in the noise radiating from the intake system is generally affected by introducing one or more resonators into the air filter box. 4 However, the acoustic attenuation frequency ranges of traditional resonators (quarter-wavelength tube, Helmholtz resonator, etc.) are too narrow for resonators to reduce the broadband turbocharger noise efficiently.…”

Section: Introductionmentioning

confidence: 99%

Acoustic performance and flow analysis of a multi-chamber perforated resonator for the intake system of a turbocharged engine

Guo

Tang

Zhu

2016

Proceedings of the Institution of Mechanical Engineers, Part D:

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A multi-chamber perforated resonator is a type of silencer which can attenuate broadband noise. In order to address the noise issues originating from the intake system of a turbocharged engine, measurement tests are carried out to characterize the range and the amplitudes of the noise frequencies. A transfer matrix method and a non-linear least-squares optimization algorithm are combined in order to design the multi-chamber perforated resonator. A transmission loss test facility is designed on the basis of the two-load method so as to validate the acoustic performance of the resonator. Despite the difference between the amplitude of the transmission loss from the tests and the amplitude of the transmission loss obtained by the transfer matrix method, the shapes of the two curves have the same trend, and the measured transmission loss can meet the design target in the frequency range of interest. From the comparison between the intake noise spectrum with the resonator and the intake noise spectrum without the resonator, it can be seen that this resonator can efficiently attenuate the broadband intake noise of the engine. Also, a computational fluid dynamics flow simulation analysis of the intake system with the resonator is made so that its flow characteristics can be studied. The simulation results show that the air pressure drop of this resonator is slightly higher than that of the straight pipes but is still relatively low. It is also noted that the diameter and the curvature of the pipes have a great influence on the air velocity as well as on the pressure drop.

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Experimental study on the comprehensive performance of the application of U-shaped corrugated pipes into reactive mufflers

Xue

Sun

2018

Applied Acoustics

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Prediction and enhancement of the acoustic performance of a spark ignition engine intake air filter box

Cited by 5 publications

References 15 publications

Acoustic Modeling and Analysis of Automotive Air-Filters

Acoustic Modeling and Analysis of Automotive Air-Filters

Acoustic performance and flow analysis of a multi-chamber perforated resonator for the intake system of a turbocharged engine

Experimental study on the comprehensive performance of the application of U-shaped corrugated pipes into reactive mufflers

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